Laundry detergent can be expensive, and using too much soap can break down the fibers in your clothes. So try this all-natural hack instead: Add a little baking soda to your washing machine. Baking soda softens the water, so you can use a little less detergent to do a load of laundry. It naturally helps brighten whites and colors, too. All you need to do is add half a cup of baking soda to top-loading machines and just 1/4 cup to front-loading machines.